Allen-Bradley MPL-SSN-A5B5 Shaft Seal Kit: Detailed Product Specifications, Applications, Advantages, and Related Models

1. Product Overview

The Allen-Bradley MPL-SSN-A5B5 is a mechanical shaft seal kit designed for compatible MP-Series low-inertia servo motors. Its purpose is to provide a sealing interface around the motor shaft, helping reduce the entry of dust, particles, and other contaminants into the shaft opening.

This product is a maintenance accessory, not a complete servo motor, servo drive, or electronic control module. It has no independent electrical rating, output power, encoder, or brake. Its function is mechanical: to help maintain the shaft’s sealing arrangement when installed on a compatible motor.

The MPL-SSN-A5B5 is intended for MPL-A45xx and MPL-B45xx motor families and is also listed for compatible MPM-A130xx medium-inertia servo motors. Before ordering, confirm the complete motor catalog number and the relevant shaft configuration.

2. Technical Specifications

Dimensions and weight: The 25 × 62 × 7 mm measurements refer to the seal’s inner diameter, outer diameter, and width. The approximate weight of 0.358 kg is a reference value for the listed item; confirm the actual supplied kit and packaging if an exact shipping weight is required.

3. Dimensions and Weight

MPL-SSN-A5B5

25 × 62 × 7 mm

Inner diameter × outer diameter × width

Reference weight: 0.358 kg

Verify the supplied kit and packaging for exact logistics measurements.

The seal’s inner diameter must match the intended shaft and sealing arrangement. Its outer diameter must fit the designated housing or seal seat, and its width must match the available installation space.

The dimensions above describe the seal itself, not the complete servo motor. The overall package dimensions are not confirmed, so they should be measured or checked against the actual supplied item when required for storage, shipping, or installation planning.

4. Product Introduction and Operating Principle

The MPL-SSN-A5B5 is designed to help maintain a protective seal around the rotating shaft of a compatible servo motor. The sealing lip contacts the appropriate shaft surface and helps limit the entry of external contaminants through the shaft opening.

This is particularly useful in industrial environments where motors may be exposed to dust, airborne particles, oil mist, grease, or other production residue. The seal can help preserve the intended condition of the shaft opening, but it does not make an otherwise unsuitable motor suitable for severe washdown or immersion.

The kit uses nitrile rubber, a material commonly used in industrial sealing applications because of its resistance to many oils and lubricants. Its suitability still depends on the actual operating temperature, chemical exposure, lubricant, shaft finish, and installation conditions.

As a replacement accessory, the MPL-SSN-A5B5 is intended to restore the sealing arrangement rather than change the motor’s electrical or motion-control performance. Correct fit and careful installation are therefore more important than electrical specifications.

5. Main Advantages

5.1 Helps reduce contamination at the shaft opening

The seal creates a mechanical barrier that helps limit the entry of dust and other contaminants around the motor shaft. This is useful in machinery operating in environments where airborne particles or industrial residue are common.

5.2 Supports routine motor maintenance

A worn or damaged seal may be replaceable without replacing the complete servo motor, provided the shaft, housing, and other motor components remain in serviceable condition. This makes the kit useful for planned maintenance and repair work.

5.3 Compact and straightforward design

With dimensions of 25 × 62 × 7 mm, the seal is a small component compared with the complete motor assembly. It is relatively easy to store as a maintenance spare and identify by its catalog number.

5.4 Nitrile rubber construction

Nitrile rubber is commonly used for seals exposed to compatible oils and lubricants. The material offers a practical solution for many industrial applications, although chemical and temperature compatibility must be checked for each installation.

5.5 Defined motor-family compatibility

The MPL-SSN-A5B5 is associated with particular motor-frame families. This provides a clearer selection route than choosing an unverified generic seal based only on its appearance.

5.6 Helps maintain equipment reliability

A correctly installed seal can help reduce contamination-related maintenance problems. Its effectiveness depends on the shaft condition, seal installation, environment, and adherence to the motor’s maintenance requirements.

6. Typical Applications

Packaging and converting machinery

Compatible servo motors may control film feeding, indexing, cutting, sealing, and product positioning. Shaft-seal maintenance helps preserve the sealing arrangement around the motor shaft.

Machine tools and precision equipment

Servo-driven axes may operate around fine particles, lubricants, or machining residue. Inspecting and replacing a worn shaft seal can form part of the maintenance routine.

Automated assembly systems

Motors used in repetitive positioning, indexing, and transfer mechanisms require reliable mechanical condition. The shaft seal is one of the components that may need periodic inspection or replacement.

Material handling and production lines

Conveyors and automated handling equipment may operate in environments with dust, grease, or other residue. A suitable shaft seal helps protect the shaft opening when used within its intended environmental limits.

The seal should not be treated as a substitute for a properly rated motor enclosure. Where equipment is exposed to heavy washdown, corrosive chemicals, or severe contamination, confirm that the complete motor and sealing arrangement are suitable for those conditions.

7. Brand and Product Series

The MPL-SSN-A5B5 is a mechanical accessory, not a servo motor or drive. It does not have its own rated torque, speed, voltage, power, feedback system, or brake.

8. Five Related Models in the Same Accessory Family

The following models are related shaft seal kits for other motor-frame groups. They are useful for maintenance planning across compatible motor families, but they are not interchangeable with the MPL-SSN-A5B5 unless the exact motor documentation explicitly permits the substitution.

The dimensions listed are seal dimensions. Weight and package measurements for the related models are not confirmed here, so they should be checked against the actual supplied kits before being used for shipping or inventory calculations.

How to choose among these models

– MPL-SSN-A3B3: Intended for compatible A3xx and B3xx frame configurations.

– MPL-SSN-A4B4: Intended for compatible A4xx and B4xx configurations, as well as certain listed medium-inertia motors.

– MPL-SSN-F165: Intended for specified 520, 540, and 560 frame configurations, plus certain compatible medium-inertia motors.

– MPL-SSN-F165-32MM: Intended for the specified B580 configuration with a 35 mm seal inner diameter.

– MPL-SSN-A6B6: Intended for the listed B6xx family and certain compatible medium-inertia motor configurations.

The safest selection method is to match the full motor catalog number against the correct seal-kit designation, then confirm the dimensions and shaft configuration. A seal with a similar appearance may still have the wrong inner diameter, outer diameter, width, or material.

9. Five Popular Related Products from the Same Brand

The following products cover servo motors, programmable control, industrial communication, and motion control. They are broader automation products rather than replacements for the shaft seal.

Exact dimensions and weight can vary by product revision and configuration. Where precise figures are not confirmed, the table explicitly identifies them for verification rather than supplying an unreliable estimate.

Product descriptions

MPL-B330P-MJ72AH

A low-inertia rotary servo motor for controlled motion in compatible industrial automation systems. It may be relevant when maintaining or configuring an MP-Series installation. Confirm the complete catalog number, rated speed, shaft type, feedback configuration, and drive compatibility before selecting it.

MPL-B4560F-SJ72AH

A larger-frame servo motor configuration intended for applications requiring controlled rotary movement. The listed frame and stack dimensions describe the motor configuration, not its shipping carton. Check the exact mechanical drawing and installation requirements before planning a replacement.

1756-L83E

A programmable controller used for machine logic, sequencing, and coordination of industrial automation processes. It belongs to the control-system category and is not a mechanical accessory.

1756-EN2TR

An industrial communication module used to provide EtherNet/IP connectivity in compatible ControlLogix systems. Selection depends on the controller architecture, network requirements, and hardware compatibility.

2094-BC02-M02

A motion-control module used in compatible Kinetix 6000 servo systems. Its suitability depends on the system architecture, power requirements, axis arrangement, and selected motors.

For all five products, obtain the exact dimensions and weight from the applicable mechanical drawing or the actual hardware. Do not use an approximate value for cabinet clearances, mounting calculations, or freight declarations when precise measurements are required.

10. Installation and Maintenance Recommendations

Before replacing the shaft seal, isolate the equipment from its power source and follow the applicable motor maintenance procedure. Servo systems can present electrical and mechanical hazards even when the motor is not actively moving.

Inspect the shaft and seal housing before installation. Scratches, corrosion, wear grooves, or other damage to the shaft surface may prevent a new seal from performing correctly.

Keep the seal clean and avoid damaging its sealing lip during installation. Use the specified lubricant and installation procedure, and do not apply unverified grease or cleaning chemicals that may be incompatible with the nitrile rubber.

After installation, check that the seal is seated correctly. Inspect the surrounding area for leakage, displacement, or unusual friction, and record the replacement date if the motor is maintained under a preventive maintenance program.

11. Product Selection Checklist

• Confirm the complete servo motor catalog number.
• Verify compatibility with MPL-A45xx, MPL-B45xx, or an explicitly listed MPM-A130xx configuration.
• Confirm the seal dimensions: 25 mm inner diameter, 62 mm outer diameter, and 7 mm width.
• Inspect the shaft and seal housing for wear or damage.
• Confirm compatibility with the application’s temperature, lubricant, and chemical exposure.
• Follow the specified installation procedure and lubricant requirements.
• Verify the actual kit weight and package dimensions for logistics planning.
• Do not substitute another seal solely because it appears similar.

12. Overall Product Assessment

The Allen-Bradley MPL-SSN-A5B5 is a compact mechanical maintenance accessory designed to help maintain the shaft-sealing arrangement of compatible MP-Series servo motors. Its primary benefits are its defined motor-family compatibility, nitrile rubber construction, compact dimensions, and practical role in preventive maintenance.

The key purchasing consideration is correct fit. The seal does not have an independent electrical or motion-control rating, and it cannot compensate for a damaged shaft, unsuitable operating environment, or incorrect installation.

For maintenance and inventory records, the principal seal dimensions are 25 × 62 × 7 mm, and the reference item weight is approximately 0.358 kg. Confirm the supplied kit’s actual weight and package dimensions whenever exact shipping or storage measurements are required.